Qlik Sense: Update a variable via API

[#1]

Hi,

I'm trying to update a variable Definition using the NET SDK.

I loaded all the variables using the client as follows (I don't know if there's a better way):

Qlik.Sense.Client.IVariableList variables = Qlik.Sense.Client.AppExtensions.GetVariableList(qsApp);

I then try to change the values using:

qsVariable.Set<string>("Definition", kpv.Value.Definition);

But this does not work.

I am lost as to which API has the information and the actions I would need to do to achieve what I want.

Thanks in advance for your help.

[petter]

You don't show in your snippets above how you define and set the reference in the qsVariable. Furthermore I can see that I find a Method called Set - have a look at this list of methods:

https://help.qlik.com/sense/2.1/en-US/developer/#../Subsystems/APIs/Content/MashupAPI/qlik-variable-...

[#3]

I'm using a dictionary as follows:

if (pVariables != null && pVariables.Count > 0) {

                            foreach (KeyValuePair<string, NxVariableListItem> kpv in pVariables) {

                                NxVariableListItem qsVariable = kpv.Value;

                                  .......

I have tried the following:

qsVariable.Set<string>("Definition", kpv.Value.Definition);

Or

GenericVariable tmp = qsApp.GetVariableByName(kpv.Value.Name);

GenericVariableProperties tmpp = tmp.GetProperties();

tmpp.Set<string>("Definition", kpv.Value.Definition);

Neither works...

[petter]

When are you trying to update the definition of the variable? You can only do that before the application is published? Are you doing this on Qlik Sense Desktop?

Have a look at the documentation here to see how to create variables:

https://help.qlik.com/sense/2.1/en-US/developer/Subsystems/NetSDKAPI/Content/WorkWith/Net-Sdk-Work-W...

[#5]

I'm (trying to) updating the variables in the qvf file locally before publishing the file in QS Server via the API.

I have looked at the examples provided. Does that mean that I should destroy the variables I want to update and create again? Seems odd!

FYI, I am able to update Connections correctly before publish.

[Øystein_Kolsrud]

I would assume you would need to do something like this:

GenericVariable tmp = qsApp.GetVariableByName(kpv.Value.Name);

GenericVariableProperties tmpp = tmp.GetProperties();

tmpp.Definition = kpv.Value.Definition;

tmp.SetProperties(tmpp);

Notice that I do not use the generic Set method for the properties structure, but instead rely on the C# class property. Also, note that your have to do a "SetProperties" after you have modified the properties structure, otherwise the engine will never be informed that the properties has changed.

[Øystein_Kolsrud]

And a small note on the line with the generic "Set" method for setting the variable definition: The engine will actually look for a property named "qDefinition", not "Definition" when evaluating a variable. The C# property "Definition" of the "GenericVariableProperties" class maps to that engine property. Actually, these two operations should be equivalent in your case:

1) tmpp.Definition = kpv.Value.Definition;

2) tmpp.Set<string>("qDefinition", kpv.Value.Definition);

Note that the property name starts with a 'q' in version 2)! The engine uses that prefix to identify properties that are to be evaluated by the engine. (Other typical examples you will encounter are "qHyperCubeDef" and "qListObjectDef".)

[#8]

Still KO!

Maybe i'm doing something wrong?

In fact, I have a local file.

1. I connect to QS and upload the file using the REST api. (qrs/app/upload?name={0})

2. I get the AppId and change the variables as per your previous message.

3. I publish/replace the file (qrs/app/{0}/publish?stream={1} or qrs/app/{0}/replace?app={1})

When I check on the published app, the variable definition is unchanged...

Any ideas??

[#9]

It's now working in 2.2.

Cheers!